Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

Abstract The Laser Interferometer Space Antenna (LISA) has two scientific objectives of
cosmological focus: to probe the expansion rate of the universe, and to understand …

A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The dawn of the twenty-first century came with very positive prospects for gravity, cosmology,
and astrophysics. Technological progress made it possible for cosmology to enter to its …

The present work studies one of Einstein's alternative formulations based on the
nonmetricity scalar Q generalized as f (Q) theory. More specifically, we consider the power …

We consider Galileon inflation in the Effective Field Theory (EFT) framework and examine
the possibility for PBH formation during slow roll (SR) to ultra slow roll (USR) transitions. We …

A century ago, Einstein formulated his elegant and elaborate theory of General Relativity,
which has so far withstood a multitude of empirical tests with remarkable success …

A bstract We study constraints from causality and unitarity on 2→ 2 graviton scattering in four-
dimensional weakly-coupled effective field theories. Together, causality and unitarity imply …

We propose a regularization procedure for the novel Einstein-Gauss-Bonnet theory of
gravity, which produces a set of field equations that can be written in closed form in four …

Recently, a novel 4D Einstein–Gauss–Bonnet gravity has been proposed by Glavan and Lin
(2020 Phys. Rev. Lett. 124 081301) by rescaling the coupling $\alpha\to\alpha/(D-4) $ and …